|
发表于 2004-2-22 20:20:15
|
显示全部楼层
不懂,既然是个signal(),那返回值就是这样了:
Returns:
A return value of SIG_ERR indicates that the request couldn't be handled, and errno is set to the value EINVAL.
Otherwise, the previous value of func for the indicated condition is returned. |
|